chore: version bump and release notes for v1.1.0 (fixes #63)

CHANGELOG.md

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+# Changelog
+
+All notable changes to this project will be documented in this file.
+
+## [v1.1.0] - 2026-07-02
+
+### Added
+- Identity lookup aliases (`gitea_get_authenticated_user` and `gitea_get_current_user`) for common MCP/LLM tool discovery.
+- macOS `com.apple.provenance` cleanup helper tool and documentation.
+- `manage_labels.py` refactored into reusable modes (`--create-labels`, `--apply-mapping`, `--add-label`).
+
+### Changed
+- Automatic `status:in-progress` cleanup on issue/PR close and merge.
+- Label cleanup now utilizes safe targeted label deletion behavior rather than replacing the entire label set.
+
+## [v1.0.1]
+- Fix Recent Timesheets Remove button text clipping and copy theme/whats_new in build.
+
+## [v1.0.0]
+- Initial versioned release.